Leer



April 4; 1933. s. B. BowMAN l1,903,282

LEER

Filed Sept. 14, 1929 2 Sheets-Sheet l 0 Q g if) w z\ D n N m f h Q1 *5wwf @i l Snventor /YameZ 23. owman April 4, 1933- s. B. BowMAN1,903,282A

LEER

Filed sept. i4, 1929 2 sheets-sheet 2 i f2 l5 fZ0 ZZ 9 10 i512 6Snoentor B Q5/0777062 2 Bowman y Gttome Patented Apr. 4, 1933 UNITEDSTATES PATENT OFFICEY SAMUEL B. BOWMAN, OF ZAJSIESVILIrE, OHIO, ASSIGNORTO HAZEL-ATLAS GLASS CO., 0F

WHEELING, WEST VIRGINIA, A CORPORATION F WEST VIRGINIA LEER yApplication led September 14, 1929. Serial No. `392,608.

The present invention is an improvement on the leer disclosed in mypending application Serial No. 286,125, iiled June 18, 1928. One of thematerial obj ectsvof the present invention is to reduce the fuelconsumption in the operation of leers. The loss of heat in the operationof leers is due to some extent to the direct conduction of heat by metalparts extending from the'interior or heated part of a leer to theexterior thereof. One of the objects of the present invention is toeliminate this source of heat loss by .a construction in which there areno metal connec-V tions between the interior and the exterior of theleer.

The invention also involves various other features for conserving theheat of the leer, and other improvements which will be apparent to thoseskilled in the art, from the following description. In view-.of the factthat the present invention constitutes an improvement in the leerconstruction shown in my application #286,125, the leer as a whole willbe described somewhat generally, and

the particular improvements involved herein will be described in moredetail.

Referring to the drawings: u

Figure 1 is a perspective view of the 1mproved leer, parts being brokenaway to show the interior construction; and U Figure 2 is a verticaltransverse sectional view taken on the line 2-2of Figure 1.

In general, the leer includes an ordinary endless chain conveyer 1,which extends the entire length of the leer. Arranged beneath theforward end of the endless conveyer is the fire-box 2; vand the furnace,which incloses the endless conveyer for a substantial portion of itslength, is referred to generally by numeral 3. At intervals the furnaceis provided, as in the usual practice, with curtains or baffies 4, whichare vertically adjusted by any desired means, such as by holes 5 and pin6. I also preferably employ a plurality of hood members 7, which areVarranged over the endless conveyer, rearwardly of the furnace; the hoodmembers are removable, and of course, the number of members employeddepends upon the particular conditions,

Referring now to the particular construction of the furnace, numeral 8indicates angle irons which extend the entire length of the leer, andwhich carry the leer bottom plate 9 which extends substantially the fulllength and width of the leer, and is preferably formed of a plurality ofplates riveted together.

At suitable intervals throughout the length of the furnace, areoppositely arranged foot members 10 which are inclined upwardly andinwardly, and which have their inner ends riveted to transverselyextending angle irons l1. Thus the transverse angle irons are spacedabove the bottom plate 9, and the ends of the angle irons are spacedinwardly from the sides of the furnace. The foot members 10 aresupported by the angle irons 8, but it is to be particularly noted thatthey are insulated from the angle irons by blocks of i heat insulatingmaterial 12, such as transite. Also to reduce the conduction of heat thefoot members are preferably provided with one or more holes 13.

Mounted on top of each of the transverse angle irons 11, is a strip ofheat insulating material 14, such as transite, and resting thereon aretwo channel irons 15, properly spaced, and extending the full length ofthe furnace; the ianges of the channel irons projecting inwardly. Thesechannel irons perform various functions. For example, they partiallyform the side walls of the leer tunnel, and also partially support boththe upper and lower runs of the endless conveyer. The channel irons aremaintained in proper spaced relation by means of spacersor tie rods 16,which are preferably in the form of channel irons or angle irons.

The leer pans forming the endless conveyer are hingedly connected, asindicated by numeral 17, and it will be noted that the ends of theseleer pans, while traveling in the lower run of the conveyer, rest on thelower flanges of the channel Virons 15. "For the purpose of supportingVthe intermediate portions of the leer pans, while in the lower run ofthe con-V veyer, I provide two rails 18, whichare supported by the angleiron 11, but which are insulated therefrom by the strip of transito 14.In the upper' run of the conveyor, the ends of the leer pans ride on theupper flanges of the channel irons 15. And for the purpose of supportingthe intermediate portions of the leer pans While in the upper run of theconveyor, l provide a T beam 19 which is suppontedbyand .riveted to thetie .beams 16.

As stated above, the channel irons l5 .partially form the side Walls ofthe tunnel. To complete 'the side walls of the tunnel l employ twolongitudinally extend-ing `vertical slabs or sheets of heat insulatingmaterial 2Q, preferably transito. These slabs or sheets are mounted onthe upper ilanges -of .the channel irons 15, and are secured in place byangle irons 2l. It :will be noted that `the avalls 20 of heat insulatingmaterial .are arranged on the outer portion of the .channel ironflanges, leaving the inner portion .of .the flanges as rails for theleer `pans Vof .the upper run of the conveyor.

'llo complete the tunnel, fthe roof is also formed of slabs or sheets ofheat insulating material 22, preferably transite, which rest on the side`Walls 29:; zthe side anadlsand Aroof being secured together by :shortsections of angle irons 23. i

rllhe space between fthe bottom 9 of the furnace and fthe :tops `of :thetransverse :angle irons 11, is packed with heat insulating material 24,such -as silfofeel. @f course, .this packing of 4sil-.o-cel .extends.the enti-re width of :the leer to the angle irons This .completes :thebottom of the leer up to the level .of kthe tops of .the transverseangle irons 11. lSiu-rrounding lthe side Walls :and .top Aof the tunnelare -blocks of Fheat insulating material 25, such as sil-o-cel. And theinsulation is completed by a second layer `of blocks 26, Aalsopreferably of sil-o-ce'l, which entirely houses the :first j acketefsil-.o-cel blocks.

For the purpose of protecting` the blocks of insulating material, lpreferably arrange metal sheets 27 along thesides of the leer, andsimilar sheets Y28 -on the .top thereof, xvi-th angle irons v29.extending along the upper edges. This metallic casing, if employed, issecured in place :by a plurality of straps B0 having :their lower endssecured to the angle kirons 8 and their upper .ends vbent over the angleirons 29; .op-positely arranged straps being adjustably `connected attheir upper ends :the :threaded tie rods 31.

A plate 32 is attached to the vfront of the leer, and slidably mountedon said plate is a .door `which is .made `.of heat insulating material.'The door is provided with racks 34 .engaged by gears 35 fixed to ashaft 36 which is rotatably mounted in bearings 8'!" g a hand Wheel 38'being provided for the purpose of rotating the shaft. Thus the door maybe vertically adjusted according to the height of the Ware being-annealechthereby further conserving `the heat Yof the leer. For :thepurpose of maintaining the ldoor in its Ynoted that'in the constructiondescribed, there is no direct conduction of'heat'by metal from theinterior of the leer to the exterior thereof.

llVhile the invention has been described in `considerable detail, itwill be understood that it is subjectto numerous modifications andchanges, all of which l .aim to include in the scope of .the yappendedclaims.

Having fully described my invention, what il .claim :as new Lis.:

l. A leer including channel irons ,partly forming :the side vvWalls ofthe tunnel, heat insulating blocks mounted l.on -said channel irons andcompleting the tunnel side Walls, a roof of heat Ainsulating''materialmounted `on said blocks, and an endless conveyor traveling through `thetunnel.

2. A. leer including metallic members :partly forming :the side wallsl.of the tunnel, heat insulating blocks mount-ed on said metallicmembers and completing the tunnel side walls, -a-n endless conveyortraveling through the tunnel, land flanges on the metall-ic men1 berssupporting the upper run ofthe conveyer.

3. A leer including .parallel spaced channel irons partly formi-.ng theside `walls of the tunnel, an endless convcyer traveling through thetunnel, the upper flanges of the channel irons forming supports for theupper run of the conveyer, and the lower flanges .of the 5' channelirons forming supports for .the lower run of the conveyor.

4. A leer including parallel spaced channel irons partly forming theside Walls Aof the tunnel, an endless con'veyer traveling through thetunnel, the upper flanges of the channel irons forming supports for theupper run of the conveyor, the lower flanges of the channel ironsformi-ng supports for the lower run of the conveyor, and blocks of-heatinsulating material mounted on the upper flanges to complete the tunnelside Walls.

5. A leer including longitudinally extending frames, transverse membersspaced from the bottom and sides of the leer, a tunnel supported by saidtransverse members, foot members attached to said transverse members andsupported by said frames, and heat insulation material between the footmembers and the frames.

6. A leer including a plurality of transverse members s aaced from thebottom and sides Aof the leer, two parallel longitudinally extendingchannel irons supported by said transverse members and partly formingthe side walls of the tunnel, an endless conveyer traveling between thechannel irons, and blocks of heat insulating material jacketing saidchannel irons.

7 A leer including a plurality of transverse members spaced from thebottom and sides of the leer, two parallel longitudinally extendingmetallic members supported by said transverse members and partly formingthe side walls of the tunnel, hea-t insulating material completing thewalls of the tunnel, and heat insulating material filling the spacebetween the tunnel and the top, bottom, and sides of the leer.

8. A leer including a plurality of transverse members spaced from thebottom and sides of the leer, rails mounted on said members butinsulated therefrom, tunnel side walls mounted on said members butinsulated therefrom, and an endless conveyer, the lower rui of saidconveyer adapted to ride on said rai s.

9. A leer including a plurality of transverse members spaced from thebottom and sides of the leer, tunnel side walls mounted on said membersbut insulated therefrom, tie rods connecting the side walls, alongitudinally extending T beam mounted on said tie rods, and an endlessconveyer, the upper run of said conveyer adapted to ride on the T beam.

l0. A leer including a tunnel, a leer frame, a conveyer adapted to carryware through the tunnel, the upper and lower runs of said conveyer beingwithin the tunnel, the top, bottom and sides of the tunnel being spacedfrom the top, bottom and sides respectively of the leer, heat insulatingmaterial filling the space between the tops, bottoms and sides of thetunnel and leer, downwardly extending metal parts for supporting thetunnel thus spaced from the to bottom and sides of the leer, and meansor insulating the metal parts from the leer frame.

SAMUEL B. BOWMAN.

